#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
struct stu
{
	char name[30];
	int age;
	double leistung;

};
int main()
{
	struct stu arr[] = { {"claus",18,75},{"leo",19,80},{"jay",20,95} };
	int sz = sizeof(arr) / sizeof(arr[0]);
	qsort(arr,sz,sizeof(arr[0]),)
	return 0;
}